( 9 + root 5 ) ( 2 - root 5
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Answer:
9 + root 5 ) ( 2 - root 5jigthghhhjjhhij
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Answer:
( 9+√5)(2-√5)
=9(2-√5)+√5(2-√5)
=18-9√5+2√5-5
=13-7√5
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